Should the Ford Mustang use 92 or 95 octane gasoline?

1 Answers
DelAdalynn
07/30/25 7:19am
According to the official vehicle manual recommendation, the Ford Mustang should use 92 octane gasoline. In addition to checking the appropriate gasoline grade in the vehicle manual, Ford Mustang owners can also find this information on the fuel tank cap, which will be clearly marked. Generally, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. However, with the application of new technologies, the compression ratio alone cannot determine the appropriate gasoline grade. High compression ratio engines can still be tuned to use lower octane gasoline because other factors, such as ignition timing, turbocharging technology, and Atkinson cycle technology, also play a role. Generally, the higher the gasoline octane number, the higher the octane value and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If the Ford Mustang occasionally uses the wrong gasoline grade, simply switch back to the correct grade after the current tank is used up. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower octane gasoline, using a higher octane grade will not cause damage, but the increase in octane value can alter the fuel's ignition point, leading to delayed combustion in the engine. This results in reduced engine power and thermal efficiency, with the practical effect being poorer performance. For vehicles recommended to use higher octane gasoline, using a lower octane grade can cause engine knocking. Because the octane value is much lower, the reduced ignition point may cause the gasoline to ignite prematurely during the compression stroke. If combustion occurs before the spark plug fires, resistance will arise during the upward stroke. This resistance makes the engine run very unstably. Mild knocking may only increase noise without significant engine damage, but noticeable knocking indicates severe engine conditions. The vibrations not only affect driving stability but can also cause abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring.
Was this review help?
10
2
Share
More Forum Discussions

How to Deal with Dampness and Musty Smell Inside the Car?

It is necessary to thoroughly clean and disinfect the vehicle's interior. Especially the air conditioning pipelines. After use, the air conditioning pipelines should be cleaned to avoid odors, and garbage should be promptly removed. Drive the vehicle to the brand's after-sales service department for targeted repairs. This can completely solve the problem and prevent it from affecting the vehicle.
8
2
Share

How to Align the Timing Chain of the 4RB2 Engine?

After removing the cylinder head, sequentially remove the fan belt, slide rail assembly, damping plate assembly, and crankshaft timing sprocket. Straighten the chain, measure at 3 to 4 selected positions, and replace the chain if necessary. The minimum value for the intake camshaft timing sprocket is 113.8mm. Inspect the slide rail assembly and damping plate assembly; replace them if the maximum wear exceeds 1mm.
8
2
Share

How to Operate the Lynk & Co 03 at Traffic Lights?

When waiting at a red light while driving, first maintain an appropriate distance from the vehicle in front to prevent the car from rolling backward if your foot suddenly releases the brake. Then shift the vehicle into neutral. Engage the handbrake, release both feet, or press the parking button to prevent the car from rolling.
3
3
Share

How to align the timing chain on a Mazda6 2.0 engine?

Remove the right half shaft. There is a timing inspection hole on the side of the engine block. Note that at this point it is slightly before reaching top dead center. There is a timing hole. Use an M6 bolt to screw it upwards onto the front timing rail cover. Install one upper bolt. The final step requires fixing both camshafts in place first.
11
3
Share

How to Remove the Lynk & Co Mechanical Key?

The key is a remote and mechanical two-in-one design, with the mechanical key hidden inside the remote key. First, locate the release button on the key and press it. Then, slide the key cover open slightly and flip it open. The lifespan of the car key battery depends on usage frequency, making it difficult to determine the exact replacement time.
6
3
Share

How to Disassemble a Malibu Car Key?

Press the side button near the bottom of the transmitter and pull out the key. Use a screwdriver to pry open the car key. There will be a small gap in the middle of the key. The front suspension type is MacPherson independent suspension, and the rear suspension type is multi-link.
4
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.